Change OpenWRT's DHCP lease time to 2m am: 66676e274a am: e548975820 am: 63dbb13ebc

Original change: https://android-review.googlesource.com/c/platform/external/openwrt-prebuilts/+/2746573

Change-Id: I463b152f420b81bd855bc79e6bead3cff0d0514d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>